The FLIR ONE Generation 2 is a small infrared camera that plugs into a smart phone.
It can't be beat for checking hives in the winter when you don't want to open them.
As usual, click one to enlarge,
Some of the hives
Looks like the feral hive in the wall upstairs is also doing well!
(to the right of the window)
The top bar swarm that moved in.
Useful for finding anything putting out heat. It can even register the output of a single insect.
A honey bee entering the top bar hive.
(the little white spec)
This is an alder bug on the window